Front Speed Sensors
- Remove harness connector clamp. Unplug connector from front wheel speed sensor. Measure resistance between speed sensor terminals. Resistance should be 920-1220 ohms.
- Measure continuity between each sensor terminal and sensor body. Continuity should not exist. If resistance and continuity are not as specified, replace speed sensor.
- Inspect sensor rotor teeth for scratches, cracks, warping, or missing teeth. Connect oscilloscope to speed sensor connector. Drive vehicle at 12.4 MPH and observe speed sensor output wave. See Fig 1. Verify "C" is at least 0.5 volt. Verify "B" is at least 70 percent of "A". If pattern is not as specified, replace sensor rotor.
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